热等静压ZrO_2-Y_2O_3陶瓷的组织结构与性能

Abstract

Abstract: The microstructure and mechanical properties were studied for hot-isostatic-pressing (HIP) and aged ZrO2-5 mol% Y2O3 alloy by means of TEM and XRD. It was shown that comparing with the as-received state (HIP, not aged), the "tweed" structure obtained in early stage of aging (1100℃) generated a combination of high strength and high fracture toughness (bending strength increased from 565MPa to 990MPa). However, when it transforms into "colony" structure in later stage of aging (1400℃), the strength decreases to a value much. lower than that of the as-received alloy as a result of t-ZrO2 precipitation and the increase of Y2O3 content in the matrix.

Key words: zirconia ceramied, diffusional precipitation, HIP

Zhou Yu;Lei Tingquan;Sakuma. MICROSTRUCTURE AND MECHANICAL PROPERTIES OF HIP AND AGED ZrO_2-Y_2O_3 CERAMICS[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 1990, 11(9): 487-495.

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MICROSTRUCTURE AND MECHANICAL PROPERTIES OF HIP AND AGED ZrO_2-Y_2O_3 CERAMICS

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